package cn.me.gaoji;

import java.sql.SQLOutput;

/**
 * @author jia
 * @date 2021/2/23
 */
//两个线程之间通信（标志位和管程法）
//生产者消费者问题2：信号灯法，标志位解决
public class TestPC2 {
    public static void main(String[] args) {
        TV tv1 = new TV();
        new Player(tv1).start();
        new Watcher(tv1).start();
    }
}

//生产者-->演员
class Player extends Thread {
    TV tv;

    public Player(TV tv) {
        this.tv = tv;
    }

    @Override
    public void run() {
        for (int i = 0; i < 20; i++) {
            if (i % 2 == 0) {
                this.tv.play("嘉年华播放");
            } else {
                this.tv.play("抖音。。");
            }
        }
    }
}

//消费者-->观众
class Watcher extends Thread {
    TV tv;

    public Watcher(TV tv) {
        this.tv = tv;
    }

    @Override
    public void run() {
        for (int i = 0; i < 20; i++) {
            tv.watch();
        }
    }
}

//产品-->节目
class TV {
    //表演时，观众等待T

    //观众观看，演员等待F
    String voice;//节目
    boolean flag = true;

    //表演
    public synchronized void play(String voice) {
        if (flag != true) {
            try {
                this.wait();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
        System.out.println("表演了:" + voice);
        //通知观众观看
        this.notifyAll();//通知唤醒
        this.voice = voice;
        this.flag = !this.flag;

    }

    //观看
    public synchronized void watch() {
        if (flag) {
            try {
                this.wait();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
        System.out.println("观看了：" + voice);
        //通知演员表演
        this.notifyAll();
        this.flag = !this.flag;
    }
}